diff --git a/CMakeLists.txt b/CMakeLists.txt
index e019d37a..bd9430fc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -481,7 +481,7 @@ if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR (CMAKE_C_COMPILER_ID
                 set(VISIBILITY_FLAG -fvisibility=hidden)
     endif()
     if (UNIX)
-               set(CMAKE_C_FLAGS "-Wall -Werror ${VISIBILITY_FLAG} ${CMAKE_C_FLAGS} -pthread" )
+               set(CMAKE_C_FLAGS "-Wall -Werror ${VISIBILITY_FLAG} ${CMAKE_C_FLAGS}" )
     else(UNIX)
                set(CMAKE_C_FLAGS "-Wall ${VISIBILITY_FLAG} ${CMAKE_C_FLAGS}" )
     endif(UNIX)